package pers.mingshan.thread.thread;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * 线程通信
 * @author mingshan
 *
 */
public class ThreeConditionCommication {

    public static void main(String[] args) {
        final Business business = new Business();
        new Thread(
            new Runnable() {
                @Override
                public void run() {
                    for (int i = 1; i <= 50; i++) {
                        business.sub(i);
                    }
                }
            }
        ).start();
        
        new Thread(
            new Runnable() {
                @Override
                public void run() {
                    for (int i = 1; i <= 50; i++) {
                        business.two(i);
                    }
                }
            }
        ).start();

        for (int i = 1; i <= 50; i++) {
            business.main(i);
        }
    }

    static class Business {
        Lock lock = new ReentrantLock();
        Condition condition1 = lock.newCondition();
        Condition condition2 = lock.newCondition();
        Condition condition3 = lock.newCondition();
        private int bShouldSub = 1;
        //1.
        public  void sub(int i) {
            lock.lock();
            try {
                while (bShouldSub != 2) {
                    try {
                        condition2.await();
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }

                for (int j = 1; j <= 10; j++) {
                    System.out.println("sub thread sequence of " + j + ",loop of " + i);
                }
                bShouldSub = 3;
                condition3.signal();
            } finally {
                lock.unlock();
            }
        }

        //2.
        public void two(int i){
            lock.lock();
            try{
                while (bShouldSub !=3) {
                    try {
                        condition3.await();
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }

                for (int j = 1; j <= 20; j++) {
                    System.out.println("two thread sequence of " + j + ",loop of " + i);
                }
                bShouldSub = 1;
                condition1.signal();
            }finally{
                lock.unlock();
            }
          }

          //主
          public  void main(int i) {
              lock.lock();
              try {
                  while (bShouldSub != 1) {
                      try {
                          condition1.await();
                      } catch (Exception e) {
                         e.printStackTrace();
                      }
                  }

                  for (int j = 1; j <= 100; j++) {
                      System.out.println("main thread sequence of " + j + ",loop of " + i);
                  }
                  bShouldSub =2;
                  condition2.signal();
              }finally{
                  lock.unlock();
              }
      }
    }
}
